package com.lsl.facade_pattern.example;

/**
 * description:
 *
 * @author: liushengli
 * data: 2022/11/30
 */
//投影仪
public class Projector {
    private Projector() {
    }
    private static Projector projector = new Projector();

    public static Projector getInstance(){
        return projector;
    }

    public void on(){
        System.out.println("...Projector on...");

    }
    public void off(){
        System.out.println("...Projector off...");

    }
    public void focus(){
        System.out.println("...Projector focus...");

    }
}